Magnetic instabilities in superconducting composites
Abstract
The development of magnetic instabilities in multifilamentary superconducting composites is analyzed through a study of the thermal and Maxwell equations describing the perturbations of temperature and electric field associated with the fluxjumping phenomenon. Consideration of cases in which a sufficiently large number of superconducting filaments and a sufficiently high current are involved permits treatment of the composite as a quasicontinuous medium. Stability criteria are derived for arbitrary values of the external heat transfer coefficient; it is demonstrated that the stability of the composite depends to a much greater extent on the heat exchange intensity than on heat capacity or the value of the transport current. A simplified calculation scheme is employed to investigate the stability of a circular composite conductor.
 Publication:

Journal of Physics D Applied Physics
 Pub Date:
 September 1977
 DOI:
 10.1088/00223727/10/13/017
 Bibcode:
 1977JPhD...10.1821K
 Keywords:

 Boundary Value Problems;
 Filaments;
 Magnetization;
 Metal Matrix Composites;
 Superconductors;
 Thermal Stability;
 Electric Wire;
 Heat Transfer Coefficients;
 Magnetic Diffusion;
 Maxwell Equation;
 Perturbation Theory;
 Specific Heat;
 SolidState Physics